BRESLE TESTING KIT

The bresle testing kit also known as a salt test kit or chloride test kit includes all the instruments for assessing soluble salt levels on metal surfaces and complies with the ISO 8502-6 and ISO 8502-9 standards. The gauge will specify the contamination of soluble salts on blast-cleaned surfaces prior to coating. The bresle testing kit is suitable for a wide range of surfaces, quick and simple to use and confirms adequate cleaning of surfaces before coating, preventing coating failure.

The Bresle testing method is used to establish the concentration of soluble salts on a metal surface before you start applying a coating application, for example paint. If Salts remain on the material after painting you will most likely see serious adhesion problems.

In coastal areas salt is ubiquitous, and can be tasted on your lips as your walk along a beach. Salt from sea water can quite easily become a dust-like particle moving all around us and can travel a fair distance once air born. Once a salt particle is air born it can cause contamination beneath coatings of paint on metals.

When steel is blasted clean it’s quite common for it to be contaminated by water soluble salts and corrosion products. Most compounds are practically colourless to the eye and generally sit at the lowest point in a rust pit on steel. If action is not taken to completely remove these salts before painting, the salts and corrosions cause chemical reactions which will result in blistering formation and accumulations of rust which will inevitably effect the adhesion between coating and substrate.

This contamination can be tested quickly and easily using the Bresle Test. Easy to use, pour 10mls of distilled water into the beaker and determine the conductivity using the Conductivity Meter.

1). Take a Bresle Patch and apply to the test surface.

2). Fill the syringe with 2.5mls of test water and insert through the adhesive foam into the test chamber.

3). Inject the contents, then extract back into the syringe.

4). Repeat ten cycles of injecting and extracting, then transfer the test water back into the beaker.

5). Measure the test water with the Conductivity Meter and deduct the initial conductivity reading from the result. Multiply the readings by 0.4 to give the quantity of salts in µg/cm² also known as ppm, or by 4 for the quantity of salts µg/m².

The maximum permissible surface density of salts on the steel surface prior to surface treatment depends on the type of paint to be applied and what the finished material or product is to be used for. Surface treatment specifications must, therefore, state the highest permissible surface density of salts for each particular application.

When high adhesion strength patches are required for testing on very corroded or coarse-grade blasted steel, the Bresle Patches Plus are available as an alternative to the standard Bresle patches. Additional packs of Bresle Patches can be purchased to carry out further tests using this kit.

The Bresle Test will measure contamination of water-soluble salts and corrosion products on blast-cleaned steel.These compounds are almost colourless and are localized at the lowest point of the rust pits.

If they are not removed prior to painting, chemical reactions can result in blister formation and accumulations of rust that destroy the adhesion between the substrate and the applied protective coating.

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